Exercise machine



FIG. 1 is a front perspective view of an exercise machine;

FIG. 2 is a front elevation view of an exercise machine as shown in FIG. 1;

FIG. 3 is a rear elevation view of an exercise machine as shown in FIG. 1;

FIG. 4 is a left side elevation view of an exercise machine as shown in FIG. 1;

FIG. 5 is a right side elevation view of an exercise machine as shown in FIG. 1;

FIG. 6 is a top plan view of an exercise machine as shown in FIG. 1; and,

FIG. 7 is a bottom plan view of an exercise machine as shown in FIG. 1.

The broken lines in FIGS. 1 through 7 represent unclaimed environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an exercise machine, as shown and described in the accompanying figures. 